Preparation method for molybdenum dioxide-active carbon composite material

A composite material, molybdenum dioxide technology, applied in the field of materials science, can solve the problems of difficult purification, complicated process, and many impurities, and achieve the effects of short reaction time, good repeatability, and low investment cost

Inactive Publication Date: 2016-02-24
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the invention provides a kind of preparation method of molybdenum dioxide-activated carbon composite material, and the preparation method of described this molybdenum dioxide-activated carbon composite material solves the preparation method The method of carbon / molybdenum dioxide composite material is complex, has many impurities, and is difficult to purify technical problems

Method used

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  • Preparation method for molybdenum dioxide-active carbon composite material
  • Preparation method for molybdenum dioxide-active carbon composite material
  • Preparation method for molybdenum dioxide-active carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Use 95mL of 0.025mol / L sodium molybdate solution as the anolyte, and 90mL of 0.025mol / L hydrochloric acid solution as the catholyte. Both cathode and anode use inert electrode titanium mesh, and electrolyze at a constant current of 0.6A for 15min. Repeat this twice to ensure that Na+ can be completely removed or its content is at an extremely low level, then add 0.5g of activated carbon to the molybdic acid solution obtained from the anode tank, soak for 10h under the condition of magnetic stirring, filter , Drying in an oven, put the dried material into a tube furnace in a nitrogen atmosphere at a heating rate of 2.5~10°C / min, and treat it at a high temperature of 400°C for 2 hours to obtain a molybdenum dioxide-activated carbon composite material. The obtained product is tested for EDS and XRD, such as figure 1 .

[0031] By observing figure 1 TEM image, it can be seen that molybdenum dioxide particles are uniformly dispersed in the pores of activated carbon. figu...

Embodiment 2

[0033] Use 95mL of 0.01mol / L sodium molybdate solution as the anolyte, and 90mL of 0.01mol / L sodium hydroxide solution as the catholyte. Both cathode and anode use inert electrode titanium mesh, and the constant current 0.6A electrolysis is repeated for 6 minutes. 2 times to ensure Na + It can be completely removed or its content is kept at a very low level, then add 1g of activated carbon into the molybdic acid solution obtained from the anode tank, immerse for 10h under the condition of magnetic stirring, filter, and oven dry, and dry to obtain the substance Put it into a tube furnace in a nitrogen atmosphere at a heating rate of 2.5~10°C / min, and treat it at a high temperature of 400°C for 2 hours to obtain a molybdenum dioxide-activated carbon composite material. The obtained product is tested for EDS and XRD, such as image 3 , 4 .

[0034] By observing image 3 From the EDS diagram, it can be obtained that there are only three elements of Al, Mo, and O in the product...

Embodiment 3

[0036] Use 95mL of 0.05mol / L sodium molybdate solution as the anolyte, and 90mL of 0.05mol / L sodium chloride solution as the catholyte. Both cathode and anode use inert electrode titanium mesh, and electrolyze at a constant current of 0.6A for 30min. This is repeated twice to ensure that Na + It can be completely removed or its content is kept at a very low level, then add 1g of activated carbon into the molybdic acid solution obtained from the anode tank, impregnate for 6 hours under the condition of magnetic stirring, filter, and oven dry, and dry the obtained substance Put it into a tube furnace in a nitrogen atmosphere at a heating rate of 2.5~10°C / min, and treat it at a high temperature of 400°C for 2 hours to obtain a molybdenum dioxide-activated carbon composite material.

[0037] By observing Figure 5From the EDS diagram, it can be obtained that there are only three elements of Al, Mo, and O in the product, and Al is the element introduced during the sample preparati...

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Abstract

The invention provides a preparation method for a molybdenum dioxide-active carbon composite material. An electrolytic tank is employed, positive and negative electrodes employ inert electrodes, sodium molybdate is employed as a positive electrode solution, an acid solution, a base solution or a saline solution is employed as a negative electrode solution, electrolysis is carried out in a constant current or constant voltage condition, electrolysis is carried out repeatedly, and a molybdic acid solution is prepared; then active carbon is added in the molybdic acid solution in a positive electrode tank, dipping is carried out for 1h-24h in a magnetic stirring condition, filtering is carried out, drying is carried out in a baking oven, and calcining processing is carried out in an inert atmosphere. In the inert gas calcining processing, the positive electrode solution is dried to obtain substances, the substances are placed in a tubular furnace, high-temperature processing is carried out for 2-4h with a heating speed of 2.5-10 DEG C / min in an inert atmosphere, and a molybdenum dioxide-active carbon composite material can be prepared. The method employs the ion-exchange film electrolysis technology and subsequent heat treatment, there are no any additives, the product is pure, there are no any impurities or impurity ions, and subsequent processing is simple.

Description

technical field [0001] The invention belongs to the field of material science, and relates to a nanometer material, in particular to a preparation method of a molybdenum dioxide-activated carbon composite material. Background technique [0002] As a transition metal oxide, molybdenum oxide has unique attractiveness due to its low price and rich chemical valence states, and its application fields are also diversified. Molybdenum dioxide is a multifunctional fine inorganic material. Due to the surface effect, quantum size effect, volume effect and macroscopic quantum tunneling effect of nano-molybdenum dioxide, molybdenum oxide is widely used in secondary lithium battery electrode materials, field emission, lubricants, superconductors, thermoelectric materials, electrochromic materials, capacitors, etc. , Field emission, etc. have broad application prospects. Therefore, the preparation and application research of nano-molybdenum dioxide has received extensive attention in re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/38
CPCH01M4/38H01M4/48Y02E60/10
Inventor 张全生马可尹佳佳程素贞雷天辉黄海军张伟贾李李张建辉
Owner SHANGHAI INST OF TECH
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